8   Mat                C, A;  in main()  local
22   PetscCall(MatCreate(PETSC_COMM_WORLD, &C));  in main()
23   PetscCall(MatSetSizes(C, PETSC_DECIDE, PETSC_DECIDE, m * n, m * n));  in main()
24   PetscCall(MatSetFromOptions(C));  in main()
25   PetscCall(MatMPIAIJSetPreallocation(C, 5, NULL, 5, NULL));  in main()
26   PetscCall(MatSeqAIJSetPreallocation(C, 5, NULL));  in main()
33         PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES));  in main()
37         PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES));  in main()
41         PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES));  in main()
45         PetscCall(MatSetValues(C, 1, &Ii, 1, &J, &v, INSERT_VALUES));  in main()
48       PetscCall(MatSetValues(C, 1, &Ii, 1, &Ii, &v, INSERT_VALUES));  in main()
51   PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY));  in main()
52   PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY));  in main()
54   PetscCall(MatView(C, PETSC_VIEWER_STDOUT_WORLD));  in main()
56   PetscCall(MatView(C, PETSC_VIEWER_STDOUT_WORLD));  in main()
58   PetscCall(MatGetOwnershipRange(C, &rstart, &rend));  in main()
60     PetscCall(MatGetRow(C, i, &nz, &idx, &values));  in main()
64     PetscCall(MatRestoreRow(C, i, &nz, &idx, &values));  in main()
68   PetscCall(MatConvert(C, MATSAME, MAT_INITIAL_MATRIX, &A));  in main()
75   PetscCall(MatDestroy(&C));  in main()